NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Daniel P Cahill, MD PHD

Neurological Surgery Physician in Boston, MA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1336113679

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Daniel P Cahill
Credential MD PHD
Sex Male
Practice address 55 Fruit St, Massachusetts General Hospital Nsurg Hst, Boston, MA, 02114
Phone (617) 726-2066
Fax (617) 726-4814
Enumeration date Feb 14, 2006
Last updated in NPPES Nov 29, 2012

Taxonomy & licenses

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License 217299 (MA) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1336113679 active?
Yes, as of the latest NPPES snapshot, NPI 1336113679 is active (record last updated 2012-11-29).
How do I verify Daniel Cahill's NPI record?
Cross-check NPI 1336113679 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-11-29.